Pipe-making machine.



No. 782,017. PATENTED FEB. 7. 1905. A. N. FAIRMAN.

PIPE MAKING MACHINE.

APPLICATION FILED AUG. 26, 1902..

10 SHEETS-SHEET 1.

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v PIPE MAKING MACHINE.

APPLICATION FILED AUG. 26, 1902.

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10 SHEETS-SHEET 3.

PATBNTED FEB. 7, 1905.

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APPLICATION FILED AUG 2a, 1902 wun eo Z MH Pb PATENTED FEB. 7, 1905.

A. N. FAIRMAN.

PIPE MAKING MACHINE.

APPLICATION FILED AUG. 26, 1902. 10 BHBETB SEEBTV 4.

4.42am; 6! true n i201: 3371;; afloznu No. 782,017. PATENTED FEB. 7,1905. A. N. FAIRMAN.

PIPE MAKING MACHINE.

APPLIOATIOF FILED AUG. 26, 1902.

10 SHEETS-SHEET 5.

No. 782,017. PATENTED FEB. 7, 1905. A. N. FAIRMAN.

PIPE MAKING MACHINE.

APPLICATION FILED AUG. 26, 1902.

10 SHEETS-SHEET B.

No. 782,017. PATENTED FEB. 7, 1905. A. N. FAIRMAN.

PIPE MAKING MACHINE.

APPLICATION FILED AUG. 26, 1905.

10 SHEETS-SHEET 7.

witnesses I r w PATENTED FEB. 7, 1905.

v A. N. FAIRMAN. PIPE MAKING MACHINE.

APPLICATION TILED 41116.26, 1.902.

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5mm #01; @51 attoamu No. 782,017. PATENTED FEB. 7, 1905. A. N. FAIRMAN.

PIPE MAKING MACHINE.

APPLIOATIOH FILED AUG. 26, 1902.

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and m No. 782,017. PATENTED FEB. 7, 1905.

A. N. FAIRMAN.

PIPE MAKING MACHINE.

APPLIOATION rmm AUG. 26, 1902.

10 BHEETE-BHBBT 10- wammagggug mmmmu UNITED STATES PATENT PatentedFebruary '7, 1905.

FFICE.

ALFRED NELSON FAIRMAN, OF MONTREAL, CANADA, ASSIGNOR TO MINA RUTH DUNHAMFAIRMAN, OF MONJTRIGAL, CANADA.

PIPE-MAKING MACHINE.

SPECIFICATION forming part or Letters Patent No. 782,017, dated February'7, 1905.

Application filed August 26, 1902. Serial No. 121,143.

To 111/ w/mnt it DMZ/[j concern;

Be it known that l, ALFRED N nLsoN FAIR- MAN, of the city of Montreal,district of Montreal, Province of Quebec, Canada, have invented certainnew and useful Improvements in Pipe-Making Machines;and I do herebydeclare that the following is a full, clear, and exact description ofthe same.

My invention relates particularly to machines for makingconductor-pipes; and it has for its object to trim the longitudinal sideedges of a blank and form saidside edges with interlocking devices, tobend the blank into pipe form with said folded edges in engagement, and,finally, to lock said engaging edges and to corrugate the pipelongitudinally without the corrugated pipe being acted upon more thanonce during any stage of its manufacture.

The type of machine to which my invention has particular reference isone whereby a blank is first formed into a pipe and then corrugated; andthe invention may be said briefly to consist of a machine of this typeconstructed to comprise three divisions, preferably arranged in tandem.The first division includes a clamping device for rigidly holding thesheet from which the blank is cut, a cutting or shearing and foldingdevice for cutting the sheet to the required size and simultaneouslyfolding the edges of the cut blank. The second division includes formingmeans whereby the blank is converted into a pipe with the folded edgesthereof in engagement. The third division includes means for corrugatingthe pipe and simultaneously flattening the seam, while a feed deviceadvances the blank from the first to the second division and the pipefrom the second to the third division and finally delivers the completecorrugated pipe from the machine.

For full comprehension, however, of my invention reference must be hadto the accompanying d rawings,forming a part of this specification, inwhich like symbols indicate the same parts, and Wherein Figure l is anelevation of the right-hand half of the operators or front side of myimproved machine. Fig. 2 is a similar view of the left-hand halfthereof. Fig. 3 is a transverse vertical sectional view taken on line AA, Fig. l, and illustrating particularly the means for cutting the blankand simultaneously folding the edges thereof. Fig. A is a similar viewto Fig. 3, taken on line B B, Fig. l, and illustrating particularly theformingbars, their operating-gear, the pipe-feeding carriage, and thedriving gear generally. Figs. 5, 6, 7, and S are detail views of theedge-formers for forming the interlocking lips upon the side edges ofthe blank. Fig. S) is a similar view to Fig. 1, but looking in theopposite direction, taken on line (l O, Fig. 2; and Fig. 10 is a similarview to Fig. 5), taken on line I) 1), Fig. 2. and illustratingparticularly the corrugating means. Fig. 11 is a side elevation, partlyin section. of a portion of the blank-clamping means. Fig. 12 is adetail view of a portion of the means for intermittently operating thepipe-forming bars. Fig. 13 is a detail perspective view of thefeed-racks and their drivinggear with the frame of the machine removed.Fig. 11 is a detail sectional view of a portion of the means for feedingthe pipe from division two to division three. Fig. .15 is a detailelevation of the eccentric-gear and its operating-gear for changing theposition thereof, and thereby the direction of travel of the carriages.Fig. lbf is a detail perspective view of a portion of the carriage indivision one, illustrating particularly the means for trimming thelongitudinal side edges of the blank and forming interlocking devicesthereon. Figs. 17, 18, and 19 are detail views illustrating the meansfor forming the pipe from the blank. Fig. 20 is a detail front elevationof a segment of the corrugating-carriage. Fig. 21 is a detail sideelevation of one of the brackets for supporting the corrugating-rollers. Fig. 22 is a detail perspective view of one of the guides used inconnection with the pipe-forming bars, together with the eccen tric foractuating one pair of said bars and the means for supporting said guide.Fig. 23

is a perspective view of a portion of the machine-frame, illustratingparticularly one of the standards, the carriage for feeding the pipefrom division two to division three, and the means for disengaging theportion of the feeding means from its engaging position relatively tothe pipe upon the mandrel. Figs. 2a, 25, 26, and 27 are detailperspective views of the forming-blocks for forming the interlockingdevices upon the longitudinal side edges of the blank, said viewsillustrating particularly the inside or forming faces of said block.Fig. 28 is a longitudinal sectional View of a portion of the thirddivision of the machine, illustrating particularly the relativepositions of the corrugating-rollers upon one frame or head and thecorrugatingrollers of the other frame or head of thecorrugating-carriage. Fig. 29 is a perspective view of a portion of thecorrugating-carriage, illustrating particularly the foot carried therebyfor engaging the corrugated pipe and enabling it to be delivered fromthe machine. Fig. 30 is a longitudinal sectional view of the middleportion of the machine, illustrating particularly the eccentric wherebythe driven drum is shifted into bearing relation with either of thedriving-drums or out of bearing relation with both. Fig. 31 is aperspective view of the link-bars of the clamping mechanism andillustrating particularly the distance-blocks between said link-bars.Fig. 32 is a similar view of the clamping-bars and illustratingparticularly the distance-blocks between them. Fig. 33 is a horizontalsectional view taken through the carriage in the first division abovethe hanger which straddles the longitudinal I-beam and illustratingparticularly the trundle-rollers for supporting said carriage. Fig. 34:is a longitudinal sectional view of the buffer carried by thecorrugating-carriage. Fig. 35 is a perspective view of the bearing-blockguided in the guiding-frames of the pipe-forming bars in the seconddivision of the machine, and Fig. 36 is a perspective view of one of theframes or heads of the corrugating-carriage; and Fig. 37 is a sectionalview of a portion of the frame of the machine, illustrating theconnection of one of the stays.

The frame of my improved machine consists of four standards 6, 0, (Z,and a, bolted or otherwise secured to the floor and braced together by apair of rods or bolts f, secured about midway of the height of themachine between the standards Z) and 0 and over which a pair ofdistance-pipes g are fitted and localize said standards 6 and crelatively to one another. A pair of bracing angle-irons it unite theupper portions of these standards, and an I-beam 71, provided withflanges j at each end, is bolted through said flanges to the standardsI) and c and is also supported upon brackets is, cast in one with saidstandards. This I-bcam constitutes a bedplate upon which the blank isheld while it it sheared olf and folded, and it has a pair ofangle-irons Z bolted to the opposite sides thereof to serve as rails forthe shearing and folding carriage, while a bar m, secured to said I-beamand extending longitudinally thereto, serves to guide said carriage inits movement. A clamping device clamps the sheet from which the blank isout upon the bed-plate and consists of a pair of angle-irons 11/, havinga series of distance-pieces 0 between them, and they are securedtogether by bolts p, passing through said distance-pieces and saidangle-irons. A series of bolts q serve as fulcrum-pins for the lowerends of a series of adjustable togglelinks r, the upper ends whereof arepivotally connected by pins 8, which also take through the lower ends ofa second series of togglelinks 2. and are carried between a pair of flatbars a, secured a short distance apart by a series of bolts 4) anddistance-blocks w, while the upper ends of the toggle-links t arefulcrumed, as at 0, between the bracing angleirons it. This clampingdevice is actuated by means of an eccentric 2, mounted rigidly upon ashaft 3, journaled in a pair of bearings rigidly supported upon thestandard 0 on the side thereof opposite to that facing standard 7),

each standard being formed with a series of lightening-openings one ofwhich in standard 0 accommodates the eccentric. The strap 4 of thiseccentric is integral with a rod 5, formed with an eye 6, pivoted uponthe end pin 8, and the shaft has a hand-lever 7 rigidly thereon.

The carriage, upon which is carried the means whereby the blank is cutfrom a sheet of metal and its edges are folded, is constructed andsupported and caused to travel to and fro between the standards 7) and 0as follows: A plate is bent into U form to constitute a hanger 10 withwings 11, the latter being braced by knee-braces l2, and a shoe 13,having a transverse dovetail recess, is set and fits snugly in thehanger and has a pair of gibs 14: therein, which receive between themthe guiding-bar m, rigidly upon the under side of the I beam andextending longitudinally thereto, while a series of set-screws'16project through each side of the hanger and are threaded through tappedborings in each side of the shoe and bear upon the gibs to allow ofadjustment of the hanger laterally relatively to the I-beam. A secondseries of adjusting-screws 17 are threaded up through the bottom of thehanger and bear in sockets in the under side of the shoe, these screwsbeing of sufficient strength to prevent the accidental displacement ofthe shoe from the hanger, and the function thereof is to adjust thehanger vertically relatively to the I-beam. Four trundle-rollers 18,mounted upon trunnions 19, rigidly carried by the hanger, run upon therails constituted by angle-irons Z, and it is upon these rollers thatthe total weight of the carriage and the parts carried thereby aresupported. A pair of shearing and folding devices are supported upon thewings 11 adjacent to the hanger and consist l sumes first a concave form338 and then conof a pair of adjustable supportingframes comprising aflat plate 20 and an angular block 21, rigidly secured together by ascrew 22 and tongue-and'groove connection 23 bet-ween the lower edge ofsaid angular block and the plate. This ton gue-and-groove connectionretains these parts against displacement relatively to one another,while the frames are adjustably secured to the wings 11 by bolts 323,projecting therethrough and through slot-s 2i in the wings and extendingtransversely of the machine. Each of the angular blocks has a rigid arm25 upon the outer end, whereof a forked bracket 26 is adjustably securedby a tongue-and-groove connection 27 and a bolt 28, takingthrough a slot29 in the end of the arm and a boring in the forked bracket, while aspindle 30, carrying a shearing-disk 31 between its ends, is mounted inthe prongs of this forked bracket, thus providing bearings at both sidesof the disk. Angular arms 32 are formed upon the base-plates 20, andeach has secured thereto a bearing-bracket consisting of a bored block33, having a laterally-projectingopen frame 3% integral therewith, aspindle 35 bearing in said boring and in a boring in the outer side ofthe frame. This spindle has a shearing-disk 36 rigidly on one endthereof, and its opposite end thereof is diminished and the portioncontiguous to said diminished portion threaded to receivea nut 37, whichacts as an abutment for a spring 38, the function whereof is toyieldingly maintain the latter disk in shearing engagement with the disk31. The frames (constituted by the base-plate and angular blocks)receive the folders, which consist each of a pair of members of specialfacial formation. These mem bers are secured (by screws 332) one uponthe other and to and within the frame at the front or operatofs side ofthe machine and are formed to upwardly curve and downwardly andoutwardly fold the one edge of the blank, while. the members in the rearframe up wardly curve and horizontally inwardly fold the opposite edgeof the blank. Of the firstmentioned pair of members the under oneconsists of a plate formed with. a concave-plane vertical rib 333,extending from end to end thereof and increasing gradually in heightfrom the forward end thereof, or that which first engages the blank, (aswill be presently shown) to the rear end thereof, and this forward endis formed with a gentle curve 331, while a clearance-groove 335 extendslongitudinally of and adjacent to the plane side of the rib, which isinclined slightly from its top downward toward the convex side thereof.The upper member also consists of a plate formed with a groove 336,extending longitudinally thereof, and one complete wall 337 of thisgroove corresponds to the eoncavo side of the rib, and the other wallgrzuluallyturns toward the convex wall and in so doing asformer.

stitutcs a plane portion 39, inclined slightly downwardly and toward theconvex wall. These members coact to bend the front edge of the blank toa quadrantal curve, as at 4:0, with an outwardly-projecting lip *1. Themembers of the former at the rear of the machine consist of a pair ofbars, one of which is formed with a convex face 42 and a recessed edge43, and it is secured by screws H to the overhanging portion of itscarrying-frame. The other member or bar has a continuous concave recess#15 in one side, which is flared at one end, as at 4:6, and a flange 4:?overhangs this recess and is adapted to register with the recessed edge*3 of the other member of this These members coact to bend the rear ofthe blank to a quadrantal curve, as at 14:5, with an inwardly projectinglip 1-16. This carriage (as well as the carriages in the second andthird divisions of the machine) is caused to'travel to and fro betweenthe stamiards by a pair of reciprocating racks 5O 51, to be hereinafterdescribed in connection with the driving-gear.

After the sheet is cut to the required size and formed with itslocking-lips the machine is reversed, as will be presently set forth,and the blank delivered to the second division by means of a pair ofpusher-arms carried by the first carriage and each consisting of a bar55, secured at one end by bolts 56 or otherwise to the top of the framesin which the lip-formers are carried. The other end thereof is formedwith a transverse slot 57, enlarged at its inner end and in which aspring-clip 58 is sprung and rigidly held with its lingers projectingtherefrom above and below it.- These bars are each downwardly offsetsufficiently to bring the lower edges of their free ends to a levelslightly above the level of the sheet. metal upon the bed-plate, whilethe resilient lingers of the clip are normally when not resting upon theblank sprung above and below the same.

Coming now to the portion of the machine between the standards c and(1,1 will now describe the means whereby the blank is curved into pipeform and the edges thereof interlocked.

Tubular braces 60 and (51 (similar to the braces g) extend between andare connected, respectively, to the upper ends and slightly above themiddle of these standards, and a pair of channel-irons (52 are securedto these standards slightly below the middle thereof. A pair ofpipe-forming cams 6st and are located between and a short distance fromeach standard, and each of said cams consists of a base portion (36,bolted, as at 67, to the top of the channel-irons and having a flange 68at its upper end to which a pair of cam-plates 69 and 70 are bolted, asat 71. These camplates are formed with curved inner forming faces 72 and73, the face 72 being formed on a curve of slightly less radius than theface 73 and offset downwardly therefrom, while a pair of slits 74 withenlarged inner ends are cut into the cam-plates of the cam 64 from theirinner faces to allow of the passage of the blank to its position betweenthe cams 64 and 65. A mandrel and a pair of bendingbars coact with thesecams to bend the blank into pipe form. The mandrel is made in two parts,and it extends from the standard 0 through standard (Z to standard a,one end thereof being connected by a bracket and pin 81 to the standard0 and its other end to the standard 6 by a connecting-plate 82, boltedthereto and having a flared mouth 83, which receives the end of themandrel, while the latter is prevented from sagging by a sup portingantifriction-roller 84, supported in a bracket 85 upon the standard (Zand upon which the mandrel rests through the medium of asmallantifriction-roller 86, carried thereby in a slot 87. One, 90, of theparts of the mandrel is located in the second division of the machineand extends from the second to the third standard, and the other part,91, is located in the third division and extends from the third to thefourth standard. The part is solid and slightly volutoid incross-section and has a groove 92 of semicircular crosssection in itsunder side, the volutoid form presenting a surface with the portion 93of the top thereof to one side of the vertical axial plane set below theadjoining portion 94 to the other side of said vertical plane.

The blank-bending or pipe-forming bars consist of bearing-bars 100, eachhaving one face 101 concave and a convex bearing-block 102 at each end,while a pressing-in plate 97 is carried rigidly by the upper edge ofeach bar and overhangs its concave face, and a stay 98 braces each barand prevents it bending. These bars are located with their bearingblocks102 in the runways between the camfaces 72 and 73 and the mandrel andwith the concave faces of the bars facing toward the mandrel. These barsare actuated by a pair of crank-disks 104, mounted rigidly upon theopposite ends of a shaft 105, carried in bearings 106, secured to theunder side of channelirons 62, said shaft being driven by a pair ofbevel-gears 108, one mounted thereon and the other upon a counter-shaft109, upon which a sprocket-wheel is also mounted and is driven by achain 111 from a sprocket-wheel 112 upon the main driving-shaft 113. The

operative connection between these crankdisks and the forming-bars iseffected by slid es 114, sliding in slots 115 in said crank-disks andadjustable to different radial positions (to vary the stroke thereof) byscrews 116, rotatably carried in cross-pieces 117 at the outer ends ofthe slots and threaded through tapped borings in said slides. Theseslides have axially-projecting studs 119, upon each of which one end ofa link 120 is pivoted, the other end thereof being forked and receivingbetween its prongs the lower ends of a pair of links121, variable inlength and the upper ends whereof are pivotally connected, as at 122, tothe ends of the bearing-blocks upon the ends of the forming-bars. Theupper ends of the links 120 are caused to reciprocate in a straight lineby a pair of cross-heads 123, sliding in guides 124, provided withflanges 125, through which they are secured by bolts 126 to thechannel-iron 62. (See Fig. 22.) The blank is guided to its properposition between these forming-bars by a pair of guiding-strips 127,supported by a series of pairs of brackets 128, bolted to a series ofcarrying-bars 129, bolted in turn to the top of the channel-irons 62.

WVhen the blank is being formed into a pipe, it is clamped rigidly tothe mandrel by a series of like clamping devices, of which I willdescribe one only in detail.

A cam-disk 130 is mounted upon the shaft 105 and has a peripheraldepression 131, and a rod 132 is slidabl y guided in a perforatedcrossbar 134,secured to the top of the channel-irons 62, and a sleeve135 is formed in one with a cross bar 136, secured to the under side ofsaid channel-irons, the lower end of this rod 132 carrying a trundleroll 137, which rests upon the periphery of the cam. A tubular length138, having a flanged lower end 139, is slipped upon said rod 132 and isyieldingly supported thereon by a nut 140, threaded upon said rod, andan expansile helical spring 141, bearing between said nut and the flange139. The upper end of the upper portion of this length 138 is flattenedandconcaved, as at 142, and has a series of projections 143extendingaxially of the mandrel and adapted to take into the recess inthe under side of the latter, and thereby grips and correspondinglyforms the portion ofthe blank therebetween. this tubular length beingflattened at its upper end to accommodate the forming-bars in theirreturn to their lowermost position.

The pipe formed by bending the blank around the mandrel is delivered tothe third division of the machine by a second carriage consistingof anoblong bent plate 150, secured at its ends by bolts 151 to a pair ofbrackets l52,havingsubstantially circular portions 153, adapted topartially encircle and slide upon the tubular braces 61,and horizontalplate-like portions, bolted, as at 154, to the feedingracks 50 and 51,to be presently described. A vertical tubular guide is bolted to thiscarriage midway of its length, and a rod 161, having a beveled foot 162,is guided therein and has a trundle-roll 163 on the side of its upperend, while a key 164 inside of the guide projects into a groove 165 inthe rod and prevents the turning of the latter. The foot of this rod isadapted to project into the end of the pipe when the carriage is causedto move toward the third division of the machine, and the rod isautomatically lifted away from the pipe when the carriage is returningby a bar 166. hung by hangers 167 from the top brace. This barconstitutes a rail, and the trundleroll163 is guided up onto it by ashort switching-bar 168, pivotally connected to the end thereof andprojecting-into the third division, the pivotal connection allowing itto ride over said trundle-roll as the carriage is delivering the pipeand falling behind the same when the pipe is delivered, while theopposite end of the rail extends to apoint short of the standard r inorder that the trundle-roll may fall therefrom and the foot rest uponthe mandrel when the carriage reaches this end of its travel.

The pipe is corrugated between the standards r! and e, or, as I havetermed it, in the third division of the machine, and the means to thisend are as follows: the part 91 (before mentioned) of the mandrel, whichis corrugated, and a carriage consisting of two carrying-frames 170 and171, coupled together by an open casting 172, having a pair of trundlewheels 173 carried thereby and a pair of vertical transverse ribs its ateach end, while between the ribs of each pair the lower ends of theframes 170 and 171 lit and are secured there by set-screws 175 threadedthrough the outermost rib of each pair into contact with said lower endsof the frames. A pair of stays 176 and 177 connect the top and bottom,respectively, of said frames together, and side extensions 178 of theframes are formed with hubs 179, which slide over a pair of tubularstays 180, bracing the standards and e together. This carriage issupported mainly, however, upon an I-beam 181, also serving to bracethese standards together and upon which the trundle-wheels 173 run.These frames have central openings 183 therein to accommodate themandrel, and carrying-plates 181arc bolted thereto, and each has anannular rim 185 and an opening 186, concentric to said rim. A series ofslidable bearing-brackets 187 lie upon these plates radially thereto,each bracket having a flange 1S8 upon one end, against which bears theinner end of an adjusting-screw 189,11 series of which are carried bythe rim 185, the other end of each bracket being forked and perforatedto form bearings 111) for the trunnions of corrugz'ttiug-wheels 191,while these slidable brackets are guided in their movement during adjustment by screws 192 taking through slots in said brackets into theplate 181. The ends of the racks 50 and 51 are connected by brackets 193to this carriage, and two pairs of buffers, one pair carried by thisthird carriage and the other by the standard e, preventdamage to theparts at each end of the travel of i the racks from concussion. Thebuffers carried by the carriage consist each of a bar 200, (preferablytubular,) screw-threaded at each end and in the middle and extendingthrough holes in the two frames 170 and 171.

ing-cap 201 is screwed on the forward end and a ring 202 on the rearend, the latter to A buffconstitute a stop to limit the forward movement of the buffer. An octagonal ring 203 is threaded upon the middleportion of this bar and is located between the frames, and an expansilehelical spring 201 bears between this ring 203 and the rear frame 171,while a tapped nipple 205 is screwed upon the middle of the rod outsideof the carriage and has a rubber washer 206 thereon to receive theimpact of the blow if the spring should happen to be subjected to anextraordinary impingement. The butters upon the standard a consistsimply of retractile helical springs located, preferably, in line withthe rear ends of the buffers just described.

The flattening of the pipe-seam simultaneously with the corrugation ofthe perimeter of the pipe, which is one of the features of my invention,is effected by a flattened portion 550 of the corrugated portion of themandrel and a pair of flattening-rollers 551 and 552, carried in linewith the flattened portion of the mandrel. (See particularly Figs. 2,10, 20, 21, and The roller 551 is car ried by the uppermost bracket uponthe front frame 171) of the corrugating-carriage, and the roller 552 iscarried by the corresponding bracket upon frame 171, the roller beingset closer to the mandrel than in order to completely flatten the seam,which will have been partially flattened by roller 551. This flatteningof the scam is done simultaneously with the corrugation of the pipe.

1 have thus far described the operating parts of my improved machine,and I will now set forth the means for driving same.

The main driving-slutft 113 (before mentioned) is mounted in bearings20%), hung from the braces between the standards 0 and (I, and it has apair of pinions 214) mounted rigidly thereon and intermeshing with thefeed-racks 50 and 51. A pair of gears 5212 are rigidly mounted upon apair of sleeves or bushings 213, loosely upon and eccentric to saidshaft and loosely mounted in said hanging bearings, thus supporting saidgears eccentric to the shaft. These gears intermesh with a pair of gears21st. rigidly upon a counter-shaft 215, mounted in a pair of bearings216, projecting dmvnwardly from and integral with said hanging bearings.A friction-drum 223 is mounted on the opposite end of the shaft 113 tothat upon which the sprocket-wheel 112 is mounted. This maindriving-shaft is rotated in either direction, according to the work tobe done, by a pair of friction-drtuus 221 and 225, respectively mountedrigidly upon a pair of shafts and 227. The shaft 226 is supported inbearing-boxes 228, secured to the frame of the machine, and theshaft'227 is supported in bearings carried in brackets such as thatindicated at 2:29 and located one at each side of the machine. A pair ofintermeshing gears 230 are mounted rigidly upon the adjacent ends ofthese last-mentioned shafts and are rotated by a gear 231 upon a shaft232, a driving-pulley 234 rigidly thereon being driven from anyavailable source of energy by a belt 245. Power is intermittentlytransmitted from sprocket-wheel 110 to the shaft 109, upon which it isrotatably mounted, by a clutch-block 2'76, slidably mounted thereon andkeyed thereto and adapted to engage a clutch-face 277, formed upon thesprocketwheel 110. This clutch-block is shifted into and out ofoperative engagement with said sprocket-wheel (which rotatescontinuously) by a lever-arm 278, connected midway of its lengththereto, as at 279, and pivotally connected at its lower end, as at 280,to the base of the machine, while its upper end is pivotally connectedby a link 281 to the lower end of the vertical arm of a bell-crank-lever282, fulcrumed to a transverse brace 500. A vertically-movable crankedrod 283, guided in a guide 284 upon the frame of the machine, ispivotally connected at its lower end to the end of the horizontal arm ofthe bellcrank-lever, and it has a trundle-roll 235 upon its upper end,which at times runs upon a rail 236, having a pivoted switching-bar 237and secured on the side of rack 51.

The machine is started in either direction and stopped by a lever 240,rigidly held upon the counter-shaft 215. A series of stop-bars 260 arehung from L-shaped bracket-pieces 261, adjustably secured to the top ofthe top braces (see Fig. 3) between standards I) and 0 by bolts 2652taking through slots in said bracket-pieces and threaded into the top ofsaid top braces. The connection between these stop-bars and theirsupporting-brackets consists of pivots 263 near their upper ends, whilethe vertical arms of the brackets act as a brace and preventdisplacement of the bars away from the machine. A pair of stops 400 and401 are upon one side of rack 50, and the machine is automaticallystopped at the completion of its movement in either direction by one ofthese stops engaging the upper end of a lever-arm 402, fulcrumed betweenits ends upon the counter-shaft 227 and having its lower end connectedby a link 403 to the lower end of a lever 404, rigidly secured uponcounter-shaft 215. Upon either of these stops engaging this lever 402the shaft 215 will be rotated sufficiently to throw the drivenfriction-drum 223 out of engagement with both driving-drums, thusstopping the machine. Upon the upper end of lever 402 being shiftedlever 404 will be caused by link 403 to move with it and turn the shaft215, upon which the pinion 214 is rigidly mounted. This pinion 214rotates pinion 212, which is secured rigidly upon the eccentric 213,which rotates with it and throws the shaft 113, and with itfriction-drum 223, from side to side and into bearing relation witheither of the frictiondrums 224 225 or out of bearing relation with 5both.

The corrugated pipe is delivered from the machine by a foot 385, formedon the lower end of a bar 386, carried on the rear of thecorrugating-carriage and slidably connected thereto by a pair of bolts387 taking through slots therein into tapped holes in the carriage, thebolts being loose in the slots to allow the bar to be raised upon thecorrugated pipe when coming into contact with the rear end thereof andto fall by gravity when riding off the opposite end.

The portion of the machine between standards Z) and cconstitutesdivision one, the portion between standards 0 and (Z division two, andthe portion between (Z and c division three. Thus the blank has itslongitudinal side edges trimmed and formed with interlocking devices indivision one, it is curved into pipe form and its edges are locked indivision two, and said locked edges are flattened and the pipecorrugated in division three.

Operation: The operation of my improved pipe-making machine is asfollows: It may be pointed out that the machine parts are in thepositions as illustrated in the drawings (and particularly in Figs. 1,2, and 16) when the parts in division one (1) are in the act of forminga blank 300 from a sheet 301, the parts in division two (2) in the actof bending the formed blank into pipe form, (see Figs. 1, 2, 4, 9, 17,18, and 19,) and the parts in division three (3) in the act ofcorrugating the formed pipe and flattening the seam. (See Figs. 2, 10,20, and 21.) Vvith the driven frictiondrum 223 in bearing relation withthe driving frictiondrum 224 upon shaft 226 the racks 50 and 51 (seeFigs. 1, 4, 13, and 23) and the carriage moved thereby will be caused totravel in the direction indicated. The sheet metal from which the blankis to be formed is first inserted between the clamp and bedplate of thefirst division and pushed in until it comes into contact with thestop-bars 260, (see Figs. 1, 3, and 16,) the machine having been firstoperated to bring the carriages to the extremity of their travel towardthe left, (looking at Figs. 1 and 2.) The clamp, Figs. 1, 3, and 11, isthen operated and the sheet of metal rigidly held. The starting-lever isthen shifted to the position shown in Fig. 1, thus causing the sheet tobe cut to the required width and the edges thereof formed withinterlocking lips. When the carriages arrive at the end of their traveltoward the right, the machine is automatically stopped by the stop 401upon the rack 50 coming in contact with and shifting the lever 402,thereby rotating the eccentric 213 through the medium of link 403, lever404, shaft 215, pinion 214, and pinion 212, thus throwing the drivenfrictiondrum 223 out of bearing relation with the driving-drums andstopping the machine. The clamp is then released and the lever 240 isshifted, thereby reversing the machine and causing the first carriage topush the formed in place and the machine is again started as firstmentioned, thereby forming a new blank and simultaneously forming apipe, wit-h edges interlocked. from the first blank, after which themachine is again automatically stopped.

The clamp is then again released and the machine once more reversed, theformed pipe delivered into the third division, and simultaneously thesecond blank delivered to the second division and the machine againautomatically stopped. A third sheet is then inserted into the tirstdivision and clamped in place and the machine started, therebysimultaneously corrugating the pipe and flattening its seam, forming apipe from the second blank and forming a third blank, after which theclamp is released and the machine reversed, thus delivering a completedpipe from the machine, and another is completed and delivered upon eachreciprocation of the machine.

What I claim is as follows:

l. in a pipe-making machine the combination with n ains for forming apipe, of a reciprocatory device, and means carried by said device andadapted to coact with the pipeforming means whereby during movement inone direction a pipe is formed, and during movement in the oppositedirection the pipe is fed from the pipe-forming means.

2. .In a pipe making and eorrugating machine the combination with meansfor forming a pipe to be subsequently corrugated and means foreorrugating the pipe previously formed by said pipe-forming means, of areciprocator v device and an operative connection between said deviceand the pipe forming and eorrugating means whereby during by saidblank-forming means, and means for eorrugating the pipe previouslyformed by said pipe-forming means, of a reciprocatory device and meanscar ied by said device and adapted to coact with said blank and pipeforming and pipe-eorrugating means whereby A new sheet is then insertedinto division one and clamped during movement in one direction a blankanda pipe are formed and a pipe is corrugated siniu[taneously, andduring movement in the opposite direction the blank is fed from theblank-forming means to the pipe-forming means, the pipe from thepipe-forming means to the pipe-corrugating means and the corrugated pipefrom the eorrugating means, simultaneously.

t. A pipe forming and eorrugating machine consisting of three divisionsarranged in tandem, the lirst divisioncomprising means for forming ablank from a sheet of metal, the second division comprising means forforming a pipe from a blank formed in said first division, and the thirddivision comprising means for eorrugating the pipe formed in said seconddivision, and means for operating the mechanism in said three divisionssimultaneously.

5. A pipe forming and eorrugating machine consisting of three divisionsarranged in tandem, the tirst division comprising means for forming ablank from a sheet of metal, the second division comprising means forforming a pipe from a blank formed in said first division, and the thirddivision comprising means for eorrugating the pipe formed in said seconddivision, means for operating the mechanism in said three divisionssimultaneously, and means for feeding the blank from division one todivision two, the pipe from division two to division three, and thecorrugated pipe from division three.

6. In a pipe-forming machine the combination with pipe-forming means anda suitablysupported bed-plate extending longitudinallyof said machine,means {for clamping a sheet of metal from which a blank is to be outupon said bed-plate, a blank-shearing device, and an edge-folding orhook-forming device, of means for causing said shearing and folding orhook-forming devices to travel longitudinally to said bed-plate, andoperate simultaneously to shear the blank and fold the edge thereof.

7. In a pipe-making machine, the combination with the frame thereof,pipeforming means, and a suitably-supported bed-plate, of aclamping-bar; a series of togglebars connecting said clamping-bar to theframe, a rigid link-bar connecting the pivot-points of said toggle-barstogether, an eccentric, means connecting said eccentric to saidlink-bar, a blankshearing device and an edge-forming device, and meansfor causing said shearing and forming devices to operate simultaneously,substantially as described and for the purpose set forth.

8. Ina pipe-forming machine the combination with pipe-forming means anda suitablysupported bed-plate, of means for clamping a sheet of metalfrom which a blank is to be cut upon said bed-plate, a carriage, ablank-shearing device and an edge-forming device both too IIO

mounted upon said carriage in positions to act upon the clamped sheet ofmetal, means for causing said carriage to travel from end to end of saidbed-plate, and means for delivering the cut and formed blank from saidbed plate to said pipe-forming means, substantially as described and forthe purpose set forth.

9. In a pipe-making machine, the combination with pipe-forming means, ofa pair of standards, an I-beam extending between and secured at its endsto said standards and arranged with its flanges horizontal, a pair ofrails secured one on each side of the web of said I-beam a carriagehaving a pair of trundle-rolls thereon adapted to run upon said rails, ablank-shearing device and an edgeforming device both mounted upon saidcarriage in positions in line with the sides of the top flanges of saidI-bcam, means for causing said carriage to travel from end to end ofsaid I-bearn, and means for delivering the cut and formed blank fromsaid top flange to said pipeforming means, substantially as describedand for the purpose set forth.

10. In a pipe-making machine the combination with means for curving ablank into pipe form and means for corrugating the pipe thus formed, ofa mandrel forming a part of said curving and corrugating means andextending continuously through said curving and corrugating means, forthe purpose set forth.

11. Blank shearing and forming means comprising a support for a sheet ofmetal from which the blank is to be cut and formed, means for rigidlyholding said sheet upon said support, a pair of forming-blocks locatedat each side of said support, means for coupling said forming-blockstogether, shearing means carried by each pair of said blocks, and meansfor causing said blocks to travel longitudinally of said support,substantially as described and for the purpose set forth.

12. In a pipe-forming machine the combination with a mandrel, of a pairof guiding devices encircling said mandrel a distance apart, a pair offorming-bars extending parallel to said mandrel and having their endslocated in said guiding devices, means for feeding a pipeblank betweensaid forming-bars and mandrel, and means for causing said forming-barsto move laterally and around said mandrel, substantially as describedand for the purpose set forth.

13. In apipe-foiming machine the combination with a mandrel and meansfor supporting the same, of a bearing device, means for moving saidbearing device around said mandrel, means for varying the extentofmovement of said bearing device, and means for guiding said bearingdevice in its movement.

14. In a pipe-forming machine the combination with a mandrel with itshalves on opposite sides of a vertical axial plane of diflerent diameterand means for supporting the same,

of movement of said bearing devices, and

means for guiding said bearing devices adjacent to said halvesof themandrel in their movement.

' 16. Inapipe-formingmachinethe combination with a mandrel and means forsupporting the same, of a pair of bars extending parallel to saidmandrel, a shaft extending parallel to said mandrel, means forintermittently rotating said shaft, a disk rigidly upon said shaft, apitman, means for pivotally connecting one end of said pitman to saiddisk eccentric thereto, a pair of links pivotally connected at one endof each to the other end of said pitman and at their other endsrespectively to said forming-bars, and means for guiding said bars tofollow the contour of said mandrel, substantially as described, and forthe purpose set forth.

17. In a pipe-forming machine the combination with a mandrel and meansfor supporting the same, of a pair of bars extending parallel to saidmandrel, a shaft extending parallel to said mandrel, means forintermittently rotating said shaft, a disk rigidly upon said shaft, apitman, adjustable means for pivotally connecting one end of said pitmanto said disk eccentric thereto, a pair of links pivotally connected atone end of each to the other end of said pitman and at their other endsrespectively to said forming-bars, and means for guiding said bars tofollow the contour of said mandrel, substantially as described, and forthe purpose set forth.

18. In a pi pe-forming machine the combination with a mandrel and meansfor supporting the same, of means for clamping a pipeblank upon saidmandrel a bearing device, means for moving said bearing device aroundsaid mandrel, and means for guiding said bearing device in its movement.

19. In a pipe-forming machine the combination with a mandrel having alongitudinal groove and means for supporting the same, of a bearingdevice, means for moving said bearing device around said mandrel, meansfor guiding said bearing device in its movement, and means for clampinga pipe-blank upon said mandrel consisting of a shaft, means forintermittently rotating said shaft, a cam rigidly upon said shaft, areciprocal rod 0peratively connected to said cam and having a projectionat one end adapted to fit into said IIO groove in the mandrel,substantially as described and for the purpose set forth.

20. In a pipe-making machine the combination with a mandrel having aflattened portion extending from end to end of one side of the perimeterthereof said mandrel being adapted to receive a pipe the seam whereof isto be flattened, a reciprocatory head,,a seanrflat' tening rollermounted rigidly upon said head and adapted to coact with said flattenedpornation with pipe-forming means comprising a tion of the mandrel toflatten the seam of the pipe during the movement of the head in onedirection, of means for feeding a pipe, the seam of which is to beflattened, onto the mandrel, and means for delivering the pipe from themandrel after the seam has been flattened.

21. In a pipemal:ing machine the combination with a mandrel having aflattened portion extending from end to end of one side of the perimeterthereof said mandrel being adapted to receive a pipe the seam whereof tobe flattened, a reeiprocatory head a seam-flattening roller mountedrigidly upon said head and adapted to coact with said flattened portionof the mandrel to flatten the seam of the pipe during the movement ofthe head in one direction, of means for feeding a pipe, the seam ofwhich is to be flattened, onto the mandrel, and means acting inconjunction with said head for delivering the pipe from the mandrelafter the seam has been flattened.

In a pipe-corrugating machine the combination with a' longitudinallycorrugated mandrel having a flattened portion extending from end to endof one side of the perimeter thereof said mandrel being adapted toreceive a pipe the seam whereof is to be flattened, a reciprocatorycorrugating-head, a seam-flattening roller mounted rigidly upon saidhead and adapted to coact with said corrugatinghead and flattenedportion of the mandrel to flatten the seam of the pipe during themovement of the head in one direction, of means for feeding a pipe, theseam of which is to be flattened, onto the mandrel, and means acting inconjunction with said head for delivering the pipe from the mandrelafter the seam has been flattened.

23. In a pipe-eorrugating machine the combination with a longitudinallycorrugated mandrel having a flattened top upon which the pipe-seam isflattened, and means for feeding a pipe to be corrugated to said mandrelof an annular frame encircling said mandrel, a series ofbearing-brackets carried rigidly upon said frame radially of saidmandrel, a flattening-roller carried by the inner end of the topbracket, a series of eorrugating-rollers carried by the inner ends ofthe other brackets and bearing in the corrugations in said mandrel, andmeans for reciprocating said frame longitudinally of said mandrel,substantially as described and for the purpose set forth.

2%. In a pipe-forming machine the combination with pipe-forming meanscomprising a mandrel and accessory pipe-forming parts, and areciprocating pipe-feeding carriage, of a verti *al slidable deviceadapted to automatically assume a position adjacent to said mand relwhen said carriage moves in one direction, and means for sliding saiddevice vertically away from said mandrel when the carriage moves in anopposite direction, substantially asdescribed and for the purpose setforth.

In a pipe-forming machine the combimandrel and accessorypipe-formingparts,and a reciprocating pi pe-fecding carriage: of avertically-movable rod having a foot at its lower end and a trundle-rollat its upper end, said rod being adapted to automatically assume aposition adjacent to said mandrel when said carriage moves in onedirection, a rail, means for suspending said rail above said mandrel,and a switching-piece pivoted to one end of said rail for engagingbeneath said trundleroll and moving said rod away from said mandrel whenthe carriage moves in an opposite direction, substantially as describedand for the purpose set forth.

26. The combination with a pipe forming and corrugating machine in threedivisions consisting respectively of a blank-formingdivision, apipe-forming division, and a pipecorrugating division, of a pair ofoppositelydriven friction-drums a short distance apart, alaterally-adjustable shaft extending between said friction-gears, afriction-drum rigidly upon said shaft and adapted upon adjustment ofsaid shaft to engage either gear of said pair, a pair of pinions rigidlyupon said shaft, a pair of slidable toothed racks extendinglongitudinally ofsaid machine and in engagement with said pinions; acarriage within said first division and secured to one end of saidracks, and carrying the blanlv forming means; a second carriage withinsaid second division and secured to said racks midway of their lengthand carrying means for acting upon the formed pipe; and a third carriagewithin said third division and secured to the opposite end of said racksand carrying a portion of the pipe-corrugating means, substantially asdescribed and for the purpose set forth.

27. In a pipe forming and corrugating machine including a pair ofreciprocating feedltlClIS, the combination with said racks and means forreciprocating same, of means for disconnecting said racks from theirreciproeating means upon the termination of their movement in eachdirection, substantially as and for the purpose set forth.

In a pipe-forming machine, a pair of forming-blocks located one abovethe other,

the lower one consisting of a plate having a concavo-plane vertical ribextending from end to end thereof and increasing gradually in heightfrom one end to the other, the end of least height being formed with agentle curve, said plate having a clearance-grooveextendinglongitudinally of and adjacent to the planed side of said rib,said rib having its planed side inclined downwardly toward the convexside thereof; the upper member consisting of a plate formed with agroove extending longitudinally thereof, one complete wall of saidgroove corresponding in contour to the concaved side of the rib upon theother member, the-other wall of said groove gradually turned toward theconvex wall and comprising a concave form at one portion and havinganother portion thereof plane and inclined slightly downwardly andtoward the convex wall of the groove, substantially as described and forthe purpose set forth.

29. In a pipe-forming machine, an edgeformer consisting of a pair ofmembers one of which is formed with a convex inner face and a recessededge; the other member consisting of a bar having a concave continuousrecess in one side, said recess being flared atone end, a flangeoverhanging this recess and admoted to register with the recessed edgeof the other membenand means for securing said members together,substantially as described and for the purpose set forth.

In testimony whereofI have affixed my signature in presence of twowitnesses. I

. ALFRED NELSON FAIRMAN. Witnesses:

FRED J. SEARs, FRANK H. DENMAN.

